Portable floor crane



R. E. MANLEY.

PORTABLE FLOOR CRANE.

APPLICATION FILED JULY27, 1920.

Patented July 11, 1922.

2 SHEETS-SHEET I.

MBA/LE) R. E. MANLEY.

PORTABLE FLOOR CRANE.

APPLICATION FILED JULY 27, 1920.

11. %22,%59 Patented July 11,1922

2 SHEETSSHEET 2.

mm ?W.'

UNITED STATES PATENT" ROBERT E. MANLEY, ,OF YORK, PENNSYLVANIA, ASSIGNOR TO THE MANLEY MANU- FACTURING COMPANY, OF YORK, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

PORTABLE FLOOR CRANE.

Application filed July 27, 1920. Serial. No. 399,384.

To allwhom it may concern:

Be it known that I, ROBERT E. MANLEY, a citizen .of the United States, residing at York, in the county of York and State of Pennsylvania, have invented certain new and useful Improvements in Portable Floor Cranes; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to relatively small portable floor cranes such as are now quite commonly used in'autotmobile repair shops, although the scope of the invention is not limited to an automobile crane.

'The object of the'present invention is to provide a sturdy, light weight, heavy-duty crane of reasonable price and simple design.

A further object of the invention is to provide an improved base for a wheeled crane of the type described, articularly a combination base formed part y of cast iron and partly of rolled sections of commercial type.

In the drawings;

Figure 1 is a side "elevation of a preferred form of my complete device;

Figure 2 is a side elevation of the lower portion of such crane;

Figure 3 is a plan view partly broken away for convenience of illustration of a sli htly modified form of base;

igure 4 is a vertical section of the form shown in Figure 3;

Figure 5 is a side elevation of the casting in its preferred form, and

Figure 6 is a top plan view of such casting.

The superstructure 10 of the crane is composed of a pair of angle bars 11 secured to a transverse beam 12 at their lower ends by bolts 13, and connected together at their upperends by a cap plate 14 and by the bolt 15, which serves as an axle for the pulley wheel 16. The boom members 18, which may .be of any rolled section, but are preferably angles or channel bars, are secured to the bars 11 by fastenings 19 which may be pivots, but are preferably permanent connections as shown, in which case the tension members 20 are also permanently secured to the top of the bars 11 and to the boom members 18, the axle 22 for the pulley wheel 23 serving to connect these four members. The

boom members 18 are also connected together by a short piece of angle iron 24 which is pierced to receive the free end of the hoisting cable or chain 25, which passes about the sheave 26 which carries the hook 27 and over the pulley wheels 23 and 16 to the hoisting mechanism 28, which is of usual type, and therefore need not be described.

The base for the superstructure consists of a casting 30 and a pair of arms 31 each consisting of a straight section of I-beam secured to the divergent arms 32 of the casting by means of rivets- 33, and each also secured in similar manner, as by the rivets 34, to a small yoke casting 35, carrying the usual ground-wheel 36.

In its preferred form the casting 30 has a somewhat flaring U-shaped rim 38 preferably strengthened by a diagonal rib 39 ex tending from the center of the rounded portion to the rear edge of the horizontal base 40 of the casting. Above such horizontal base is aplurality of angularly disposed ribs '41 angularly turned at their rear ends 42 to centrally pierced to receive the shaft 46 rising from the casting 47 which supports the front ground wheel 48. Integral with and merging into the lug 45 is a similar cylindri- Speclflcatio'n of Letters latent. Patentgd July 111, 11922,

cal lug 49 which is tapped to receive the v threaded end of a tension rod 50, the upper end of which is threaded to receive a bolt 51 which bears against the cap 14.

The transverse beam 12 is connected to the top flange of the I-beams 31 by means of braces 53, and similar braces 54 are similarly connected with the lower flange of the I- beam and with a transverse "member 55 directly under the beam 12. Preferably the bolt 57 which connects the braces 53 with the beam 12 passes down the depth of the I-beam and also connects the lower ,braces 54 as best illustrated in Figure 2.

The casting 60 shown in Figures 3 and 4 is similar in all general respects to the casting 30, the principal difference being that the webs 41 are omitted and a single central web 61 is substituted therefor, such web having a T-head 62 b which the casting is secured to the central portion of the beam 12 b means of the bolts 63.

at I claim is: 1. A hoist structure consisting of a super- I structure, hoisting means carried thereby, a

base for said superstructure, a tension member connecting said superstructure and said base, said base consisting of a cast metal portion in the rear of said superstructure, and rolled metal sections in front of said superstructure.

2. A portable crane consisting of a casting, a plurality of fabricated sections secured thereto, a superstructure secured to.

an enlarged support at the front end of' said casting adapted to receive a tension element and a supporting rib extending from said lug to said support.

4. In a. portable crane, a Wheel base casting having divergent arms, a plurality of sections secured thereto, a ground wheel at either end of said sections, a superstructure connected to said casting and to said sections, a forwardly projecting support integral with said castingfor supporting a third ground wheel, tension means connecting said superstructure and said support, and strengthening means integral with said casting and said support for connecting same to said superstructure.

5. In a portable floor crane, a base, a superstructure secured thereto, atension member extending from said base to said superstructure and a member extending from the lower portion of said superstructo said tension member and integral with said base, said base consisting of a casting from a point near said superstructure to said tension connection and consisting of sectional beams connected to said casting and extending from a point near said superstructure connection to the free end of said base, and means for bracing said superstructure tosaid sections.

ROBERTE. MANLEY. 

